CN108415086A - The receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus - Google Patents
The receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus Download PDFInfo
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- CN108415086A CN108415086A CN201810155012.XA CN201810155012A CN108415086A CN 108415086 A CN108415086 A CN 108415086A CN 201810155012 A CN201810155012 A CN 201810155012A CN 108415086 A CN108415086 A CN 108415086A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The present invention provides the receiving coils and transmitting coil of a kind of active pcb board of Transient Electromagnetic Apparatus, design transient electromagnetic apparatus reception and transmitting coil on printed circuit pcb board using Archimedes spiral or rectangular coil line.Pulse absorption circuit is designed on making PCB transmitting coil wiring boards, absorb and inhibits to generate back-emf on transmitting coil in switch off current, accelerates the shutdown of transient electromagnetic primary field.Design receives clamp circuit, amplifying circuit, low-pass filter circuit and the follower circuit of signal on making PCB receiving coil wiring boards, reduce influence of the ambient enviroment electromagnetic interference signal to secondary field, received signal to noise ratio is improved, the useful signal of secondary field is isolated.It is based on active reception and the transmitting coil of the Transient Electromagnetic Apparatus of PCB printed circuit boards, has the characteristics that the reproducible of small, light-weight, signal-to-noise ratio, high sensitivity, making and detection compared to passive multi-turn cable type Transient Electromagnetic Apparatus dispatch coil.
Description
Technical field
The present invention relates to a kind of transmitting of novel Transient Electromagnetic Apparatus and receiving coils, and in particular to using PCB printing electricity
Transmitting and the receiving coil of Transient Electromagnetic Apparatus are designed and made in road, and the pcb board that makes coil design active amplification and
Filter circuit extracts the secondary field signal of useful transient electromagnetic, is applied to physical prospecting field and engineering detecting field.
Background technology
It is well known that transient electromagnetic method is according to electromagnetic induction principle, primary electricity is sent to underground using earth-free line state
Magnetic field surrounds and watches the method for surveying secondary turbulence field using earth-free line in an electromagnetic field tempus intercalare, carries out different lithology stratum
Physical difference analysis.Mining transient electromagnetic method is since bulk effect is small, work efficiency is high, vertically and horizontally high resolution and to low-resistance
The sensitive advantage of precursor reactant is widely used in the water-bursting predicting and advanced prediction of mine.Transient electromagnetic equipment transmitting, receiving coil
Structure and performance be to influence Transient Electromagnetic Technique the prediction and advanced prediction of water bursting in mine and engineering geophysics an important factor for.
Currently, the dispatch coil that most of existing transient electromagnetic apparatus is made of multi-turn cable both at home and abroad, also one
Kind using magnetosensitive detection bar magnet receiving coil, it is big to all suffer from volume, weight weight, the long disadvantage of length, in narrow sky
Between and the high field locations of vegetation coverage, difficulty of construction is big, is especially in the presence of the area of up to trees, multi-turn receiving coil without
Method is dismantled around trees and is detected.Due to traditional transient electromagnetic receiving coil the number of turns 40 to upper 100 circle closing cable
Coil can not connect into take-up circle using plug connector, it is necessary to weld each cable one by one by hand, processing is bothersome laborious,
It is also easy to connection error.In the relatively high field condition of vegetation and trees, since closed loop receiving coil can not be inserted in trees and plant
By in, cause to be laid with receiving coil on sensing point.Often have no alternative but, take to fall trees solving the problems, such as with vegetation, to planting
Quilt and ecological environment impact, and are also faced with the construction compensation issue to great number.
So miniaturization, equivalent received area it is big, convenient for site operation, high s/n ratio, highly sensitive, cheap low cost
The transmitting of active Transient Electromagnetic Apparatus and receiving coil work at geophysical prospecting equipment in important topic and pursue a goal.
Invention content
The purpose of the present invention is to solve background above technology there are the problem of, propose it is a kind of use PCB printed circuits
The Transient Electromagnetic Apparatus transmitting and receiving coil that plate makes, the coil have back-emf pulse absorption circuit, amplitude limiter circuit, amplification electricity
Road and filter circuit, compared with traditional multi-turn cable transmitting and receiving coil, with making, simple, on-the-spot test is reproducible
And the characteristics of mass production, has small, light-weight, equivalent transmitting, strong antijamming capability and equivalent connects in aspect of performance
Receive the big advantage of area.
To achieve the goals above, the present invention provides a kind of receiving coil of the active pcb board of Transient Electromagnetic Apparatus and transmittings
Coil, transmitting and the receiving coil of transient electromagnetic apparatus are made of PCB printed circuit boards, and the shape of coil uses Archimedes
Helix or rectangular coil line, receiving coil and transmitting coil are by Transient Electromagnetic Apparatus host supplying power, or use battery powered.
In the above-mentioned technical solutions, PCB transmitting coils are connected by 2 core cables and plug connector with Transient Electromagnetic Apparatus radiating circuit
It connects, PCB receiving coils are connect by 4 core cables and plug connector with Transient Electromagnetic Apparatus receiving circuit.
In the above-mentioned technical solutions, pulse absorption circuit is designed on the PCB transmitting coils wiring board, absorbs and inhibit hair
Back-emf pulse is generated on ray circle in switch off current, accelerates the decaying of transient electromagnetic primary field.
In the above-mentioned technical solutions, the pulse absorption circuit includes the first resistor R1 being connected in series with, second resistance R2
With bidirectional transient voltage absorption tube DW1, equivalent PCB transmitting coils L1 is in parallel with first resistor R1, when back-emf pulse is higher than
When 1.5 times of the rated voltage of DW1, the DW1 conductings of bidirectional transient voltage absorption tube, first resistor R1 and second resistance R2 absorb jointly
Back-emf pulse energy.
In the above-mentioned technical solutions, the transmitting and receiving coil use multi-layer PCB board, each layer of coil head and the tail to connect
Connection.
In the above-mentioned technical solutions, clamp circuit is designed on the PCB receiving coils wiring board, for inhibiting amplitude one
Interference of the secondary field signal to secondary field signal.
In the above-mentioned technical solutions, Design enlargement circuit on the PCB receiving coils wiring board, for amplifying receiving coil
The signal of the secondary field of reception improves received signal to noise ratio.
In the above-mentioned technical solutions, low-pass filter circuit is designed on the PCB receiving coils wiring board, filters out reception signal
High frequency components isolate the useful signal of secondary field.
Beneficial effects of the present invention are analyzed：The active PCB coil of the transient electromagnetic transmitting and reception, in transmitting coil
Pcb board devise emission current shutdown when absorb back-emf pulse absorption circuit so that primary field subtracts the interference of secondary field
It is few, it is suppressed that receive the ingredient of the primary field in signal.Damping and amplitude limiter circuit, signal are devised in the pcb board of receiving coil
Amplifying circuit, low-pass filter circuit and output stage follower circuit so that the anti-of the secondary field signal of transient electromagnetic of reception is done
It disturbs ability, signal-to-noise ratio and sensitivity to be improved, in addition, the multi-turn cable for overcoming original transient electromagnetic apparatus uses coil
Supporting rod is unfolded, and equivalent received area is brought to change uncertainty at random.Using the active dispatch coils of PCB, and making line
Active amplifying circuit is designed on the pcb board of circle, improves the detectivity and stability of transient electromagnetic apparatus.
Description of the drawings
Fig. 1 a are that the PCB coil of the present invention is spiral of Archimedes structural schematic diagram.
Fig. 1 b are that the PCB coil of the present invention is rectangular coil cable architecture schematic diagram.
Fig. 2 is the PCB dispatch coil and Transient Electromagnetic Apparatus connection diagram of the present invention.
Fig. 3 is the transmitting coil back-emf pulse absorption circuit figure of the present invention.
Fig. 4 is the receiving coil amplitude limit of the present invention, amplification, filters and follow circuit diagram.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
The active transmitting and receiving coil of Transient Electromagnetic Apparatus of the PCB printed circuit boards of the present invention, is set using PCB circuit board
Software is counted, spiral of Archimedes or rectangular coil line are designed on single layer either multi-layer PCB board, as illustrated in figs. 1A and ib
Loop construction, can be used multi-layer PCB board, each layer of coil head and the tail are connected in series with, and increase equivalent received area.It makes
Transmitting and the connection type of receiving coil and Transient Electromagnetic Apparatus of the Transient Electromagnetic Apparatus of active PCB printing plates are as shown in Fig. 2, PCB
Transmitting coil is connect by 2 core cables and plug connector with Transient Electromagnetic Apparatus transmitting output circuit.PCB receiving coils pass through 4 cores electricity
Cable and plug connector are connect with Transient Electromagnetic Apparatus receiving circuit.The wiring line width of the PCB transmitting coils of the transient electromagnetic according to
The size of emission current, from grade to a centimetre variation, taking lamina, either multi-layer board connects or uses multi-layer board simultaneously
Connection mode increases transmitting magnetic moment, that is, increases the product of emission current and equivalent transmitting coil area.
On the pcb board of the transmitting coil for the transient electromagnetic that the present invention designs, back-emf pulse when design emission current turns off
Absorbing circuit, as shown in figure 3, being mainly made of first resistor R1, second resistance R2 and bidirectional transient voltage absorption tube DW1.Deng
The PCB transmitting coils L1 of effect is in parallel with first resistor R1, when rated voltage 1.5 times of the back-emf pulse higher than DW1, two-way wink
The DW1 conductings of state voltage absorption tube, first resistor R1 and second resistance R2 absorb back-emf pulse energy jointly.
The PCB receiving coils design for the transient electromagnetic that the present invention designs receives amplification and filter circuit, as shown in figure 4, should
± 5V the voltages of circuit board come from Transient Electromagnetic Apparatus motherboard.It is formed including following circuits：Damping and amplitude limiter circuit, PCB are received
Coil L2 is in parallel with 3rd resistor R3 and the 4th resistance R4 and the second bidirectional transient voltage absorption tube DW2, and 3rd resistor R3 is to connect
Damping resistance is received, PCB receiving coils L2 and 3rd resistor R3 is in overdamping state.Due to the mutual inductance between dispatch coil, lead
When causing field signal of reception in wire coil excessive, the second bidirectional transient voltage absorption tube DW2 conductings so that receive input
Clamper is in 5V voltages or so.Input signal is carried out by operational amplifier (model CA084) U1A to follow amplification；Signal amplifies
Circuit, the signal exported from operational amplifier U1A form amplifying circuit amplification by U1B, the 5th resistance R5 and the 6th resistance R6, put
Big multiple is determined by the ratio of the 6th resistance R6 and the 5th resistance R5；Low-pass filter circuit：7th resistance R7 and capacitance C1 groups
At low-pass first order filter, the cutoff frequency of low pass is by formulaIt determines, the signal setting of transient electromagnetic secondary field
Cutoff frequency is in 1K to 5KHz；Output-stage circuit, the signal exported from filter circuit enter what operational amplifier U1C was formed
Follower output signal passes through J2 plug connectors and receiving coil connecting cable to Transient Electromagnetic Apparatus.
The present invention designs transient electromagnetic apparatus using Archimedes spiral or rectangular coil line on printed circuit pcb board
Reception and transmitting coil.Pulse absorption circuit is designed on making PCB transmitting coil wiring boards, absorbs and is inhibited on transmitting coil
Back-emf is generated in switch off current, accelerates the shutdown of transient electromagnetic primary field.It is designed on making PCB receiving coil wiring boards
Clamp circuit, amplifying circuit, low-pass filter circuit and the follower circuit of signal are received, ambient enviroment electromagnetic interference signal is reduced
Influence to secondary field improves received signal to noise ratio, isolates the useful signal of secondary field.It is based on PCB printed circuit boards
The active reception of Transient Electromagnetic Apparatus and transmitting coil have volume compared to passive multi-turn cable type Transient Electromagnetic Apparatus dispatch coil
Small, light-weight, signal-to-noise ratio, high sensitivity, making and the reproducible feature of detection.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.
Claims (8)
1. a kind of receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus, it is characterised in that：With PCB printed circuit boards
Making transmitting and the receiving coil of transient electromagnetic apparatus, the shape of coil uses spiral of Archimedes or rectangular coil line,
Receiving coil and transmitting coil are by Transient Electromagnetic Apparatus host supplying power, or use battery powered.
2. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 1, it is characterised in that：
PCB transmitting coils are connect by 2 core cables and plug connector with Transient Electromagnetic Apparatus radiating circuit, and PCB receiving coils pass through 4 core cables
It is connect with plug connector with Transient Electromagnetic Apparatus receiving circuit.
3. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 1, it is characterised in that：
Pulse absorption circuit is designed on the PCB transmitting coils wiring board, absorbs and inhibits to generate in switch off current on transmitting coil
The decaying of transient electromagnetic primary field is accelerated in back-emf pulse.
4. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 3, it is characterised in that：
The pulse absorption circuit includes the first resistor R1 being connected in series with, second resistance R2 and bidirectional transient voltage absorption tube DW1, etc.
The PCB transmitting coils L1 of effect is in parallel with first resistor R1, when rated voltage 1.5 times of the back-emf pulse higher than DW1, two-way wink
The DW1 conductings of state voltage absorption tube, first resistor R1 and second resistance R2 absorb back-emf pulse energy jointly.
5. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 1, it is characterised in that：
The transmitting and receiving coil use multi-layer PCB board, each layer of coil head and the tail to be connected in series with.
6. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 1, it is characterised in that：
Clamp circuit is designed on the PCB receiving coils wiring board, for inhibiting field signal of amplitude to do secondary field signal
It disturbs.
7. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 1, it is characterised in that：
Design enlargement circuit on the PCB receiving coils wiring board, the signal of the secondary field for amplifying receiving coil reception, raising connect
Receive signal-to-noise ratio.
8. the receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus according to claim 1, it is characterised in that：
Low-pass filter circuit is designed on the PCB receiving coils wiring board, filters out and receives signal high frequency components, isolate secondary field
Useful signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155012.XA CN108415086A (en) | 2018-02-23 | 2018-02-23 | The receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155012.XA CN108415086A (en) | 2018-02-23 | 2018-02-23 | The receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus |
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| CN108415086A true CN108415086A (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810155012.XA Pending CN108415086A (en) | 2018-02-23 | 2018-02-23 | The receiving coil and transmitting coil of the active pcb board of Transient Electromagnetic Apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313916A (en) * | 2020-03-31 | 2020-06-19 | 湖南科技大学 | Signal transmitting device and method for reducing transient electromagnetic turn-off time |
| WO2021197368A1 (en) * | 2020-03-31 | 2021-10-07 | 湖南科技大学 | High-density integrated antenna for magnetic field receiving in electromagnetic exploration |
| CN115307719A (en) * | 2022-08-18 | 2022-11-08 | 东北林业大学 | Electromagnetic vibration sensor of flexible Archimedes spiral coil and vibration measurement method |
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| CN103117540A (en) * | 2013-03-13 | 2013-05-22 | 上海实业交通电器有限公司 | Method and loop for absorbing transient voltage of electromagnetic coil |
| CN103472488A (en) * | 2013-09-18 | 2013-12-25 | 安徽惠洲地下灾害研究设计院 | PCB coil board for transient electromagnetic surveying |
| CN105911600A (en) * | 2016-05-15 | 2016-08-31 | 吉林大学 | Matching circuit of tunnel transient electromagnetic coincident loop receiving coil |
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| CN103117540A (en) * | 2013-03-13 | 2013-05-22 | 上海实业交通电器有限公司 | Method and loop for absorbing transient voltage of electromagnetic coil |
| CN103472488A (en) * | 2013-09-18 | 2013-12-25 | 安徽惠洲地下灾害研究设计院 | PCB coil board for transient electromagnetic surveying |
| CN105911600A (en) * | 2016-05-15 | 2016-08-31 | 吉林大学 | Matching circuit of tunnel transient electromagnetic coincident loop receiving coil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313916A (en) * | 2020-03-31 | 2020-06-19 | 湖南科技大学 | Signal transmitting device and method for reducing transient electromagnetic turn-off time |
| WO2021197368A1 (en) * | 2020-03-31 | 2021-10-07 | 湖南科技大学 | High-density integrated antenna for magnetic field receiving in electromagnetic exploration |
| CN111313916B (en) * | 2020-03-31 | 2024-03-08 | 湖南科技大学 | Signal transmitting device and method for reducing transient electromagnetic turn-off time |
| CN115307719A (en) * | 2022-08-18 | 2022-11-08 | 东北林业大学 | Electromagnetic vibration sensor of flexible Archimedes spiral coil and vibration measurement method |
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Application publication date: 20180817 |